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Energy differences between frozen core and all electrons correlated.
MP2, MP3, MP4, B2PLYP, CCSD, and CCSD(T)

For H2POH (Phosphinous acid)

Energies in Hartree
Methods with standard basis sets
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z
Moller Plesset perturbation MP2=FULL -0.001832 -0.007830 -0.015088 -0.004783 -0.013997 -0.014881 -0.015772 -0.142580 -0.143148 -0.029844 -0.047449 -0.010115 -0.057552 -0.083776 -0.012256 -0.064470 -0.085921 -0.118701
MP3=FULL         -0.013356   -0.015119       -0.047448 -0.009460 -0.056872         -0.118397
MP4=FULL   -0.007380     -0.013492       -0.143469     -0.009550 -0.057829   -0.011709 -0.064916   -0.119946
Coupled Cluster CCSD=FULL         -0.013150           -0.047285 -0.009272 -0.056639 -0.083874 -0.011385 -0.063709 -0.085978 -0.118032
CCSD(T)=FULL         -0.013447           -0.047955 -0.009518 -0.057704 -0.085269 -0.011675 -0.064791 -0.087398 -0.119670
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z